This Expanding Floss Is Grossly Effective At Scraping ‘Gunk’ Off Your Teeth

A shopping writer reports that black floss has won fans for the simple reason that the gunk it removes shows up better against a dark strand than a clear one. Reviewers quoted in the piece say the visible debris has made them floss more often and feel more thorough about it.

The product also expands between teeth via four woven threads, marketed as gentler on sensitive gums than thin string floss. Prices run about seven to eight dollars depending on retailer.

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